C++int、float、double转化为string类型；string转化为int、float、double类型1

#include <iostream>
#include <string>
#include <vector>
#include <fstream>
#include <sstream>

using namespace std;

template<typename T>
void toString(T element)
{
    ostringstream oss;
    oss << element;
    string str(oss.str());

    cout << "The result: " << str << endl;
}

void toString(int element)
{
    ostringstream oss;
    oss << element;
    string str(oss.str());

    cout << "The result: " << str << endl;
}

void toString(float element)
{
    ostringstream oss;
    oss << element;
    string str(oss.str());

    cout << "The result: " << str << endl;
}

void toString(double element)
{
    ostringstream oss;
    oss << element;
    string str(oss.str());

    cout << "The result: " << str << endl;
}

int main(int argc, char *argv[])
{
    int number1 = 35;
    toString(number1);

    float number2 = 57.68f;
    toString(number2);

    double number3 = 79.90;
    toString(number3);

    return 0;
}

#include <iostream>
#include <string>
#include <vector>
#include <fstream>
#include <sstream>

using namespace std;

template<typename T>
void stringToNumber(const string& element)
{
    T number;
    istringstream iss(element);
    iss >> number;

    cout << "The result: " << number << endl;
}

int main(int argc, char *argv[])
{
    string str1("343567");
    stringToNumber<int>(str1);

    string str2("35.65778");
    stringToNumber<float>(str2);

    string str3("3.1415926");
    stringToNumber<double>(str3);

    return 0;
}